Iron Concentration is made from one of the highest bioavailable forms of Iron known as Ferrochel®. It is formulated with a naturally delicious berry flavor and concentrated enough to be put in a convenient dropper bottle. Just one milliliter provides 15 mg of Iron. Ferrochel® is a patented, nutritionally functional amino acid chelate known as a ferrous bis-glycinate chelate. Human clinical studies have shown it to be the iron of great bioavailability and tolerance (easy on the system). Menstruating and pregnant women, athletes, and vegetarians may all have difficulty getting adequate iron from their food. Not anymore!. Size Floz.